Tube bag



FIG. 1 is a perspective view of a tube bag;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view thereof in an opened configuration.

The broken lines shown in the drawings are included for purposes of illustrating environment and form no part of the claimed design. 

CLAIM I claim the ornamental design for a tube bag, as shown and described. 